Bring your own key (BYOK) means FlexyAgents calls model providers with credentials you store in the dashboard (Settings → LLM API Keys, path may include your locale prefix such as /en/). Usage on those calls is billed by your provider under your agreement; hosted plans may still enforce FlexyAgents-side quotas where the platform supplies the model.
A Google Gemini key is especially important if you use image description (vision) or audio/video transcription during knowledge uploads or website crawls: when an organization Gemini key is active, those features use your key and do not consume hosted “image recognition” or “media transcription” quotas on your FlexyAgents plan.